Passive Radiator Enclosure

Pros

• no vent resonant
• no air turbulence
• no small frequencies escapes
• space efficient

Cons

• steep roll-off
• less transient stability
• higher cut off frequency

Vd = Sd * Xmax Vd at least twice as large as active speaker

passive radiator Vd > 2 * (Speaker Vd)

Passive radiator parameter

• Vas → Mms and Sd $V_{as}=\frac{\rho \cdot c^2\cdot S_d^2}{4{\pi }^2\cdot F_s^2\cdot Mms}$ $\rho$ = $1204g/m^3$ c = speed of sound 343 m/s

• Sd

• Fs

• Xmax

• Qms

• Mms = weight of passive radiator cone + surround/2

• Cms → use weight and measure?